Non-static const

Can i not declare a non-static const data member?

Code:

---

class A
{       
        public:
        const int x;       
        A()
        {
                x = 10;           
        }
};

int main()
{
        return 0;
}

---

problem is here is, compiler allows me to declare a non-static const data member, meaning i can somehow use it. But how do i initialize it?

Constructor Initialization fails bcoz compiler prevents assignment to a const data member,
and initialization at declaration is prevented by ISO C++ std. that says i cannot initialize data members inside a class until they are static const

so, why even the declaration of non-static const data member has been allowed by the compiler, when there is no way i can initialize it ?

I'm not sure but try this is the implementation file:

const int A::x = 10;

tried this :-

Code:

---

class A
{       
        public:
        const int x;       
};

const int A::x=10;

int main()
{
        return 0;
}

---

i get this error - ‘const int A::x’ is not a static member of ‘class A’

Code:

---

class A
{       
        public:
        const int x;       
                A():x(10)
        {
        }
};

---

Quote:

---

Originally Posted by vart

Code:

---

class A
{       
        public:
        const int x;       
                A():x(10)
        {
        }
};

---

---

This is the answer you're looking for.

This is why.

wow!

initializer list is the only way i could initialize non-static const members

thanx!

It is how you should initialize almost all of your nonstatic member variables.